Panasonic KX-T7453 Service Manual page 54

KEY SWITCH
CO6 CO5 CO4
SW6 SW5 SW4
D13
CO12 CO11 CO10
TELTYPE0 SW12 SW11 SW10
D14
CO18 CO17 CO16
TELTYPE1 SW18 SW17 SW16
D15
CO24 CO23 CO22
SW22
SW24 SW23
D16
TRANS PAUSE
PROG
SW28
SW30 SW29
D17
1 2
3
SW33 SW34 SW35
D18
7 8 9
SW41 SW42 SW43
D19
REDIAL HOLD SP
SW31 SW32
SW39
D20
LCD
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
D[2],R[30-31],R[60-63]
CO3 CO2 CO1
SW3 SW2 SW64
CO9 CO8 CO7
SW9 SW8 SW7
CO15 CO14 CO13
SW15 SW14 SW13
CO21 CO20 CO19
SW21 SW20 SW19
FWD CONF INT
SW27 SW26 SW25
4 5 6
SW36 SW37 SW38
*
0 #
SW44 SW45 SW46
MW AUTO MUTE FLASH
SW47 SW48
SW40 SW49
R206
100K
LCD DRIVER
96
Y1
VCC
Y2
91
Y3
M
Y4
81
Y5 VEE
Y6
82
Y7
V1
Y8
83
Y9 V2
Y10
84
Y11 V3
Y12
85
Y13
V4
Y14
Y15
Y16
Y17
Y18
Y19
Y20
Y21
+5V
Y22
Y23
Y24
Y25
Y26
Y27
Y28
Y29 D202
Y30
Y31
Y32
Y33
Y34
Y35
Y36
Y37
LCD DRIVER
Y38
Y39
Y40
SW1
IC201
Y41
Y42
Y43
Y44
Y45
Y46
Y47
Y48
Y49
Y50
Y51
Y52
Y53
Y54
Y55
Y56
Y57
Y58
Y59
Y60
Y61
Y62
Y63
Y64
Y65
Y66
Y67
Y68
Y69
Y70
Y71
Y72
Y73
Y74
Y75
Y76
Y77
Y78
Y79
Y80
RR[70]
D[11]
17 D11
RR[71]
D[12]
18 D12
INT[1]
19 D13
INT[2]
20 R0
RR[72] R[1]
21 R01
R[2]
22 R02
R[3]
23 R03
R131 33
IOR
24 R10
RR[73]
R132 33
IOW
25 R11
R[12]
26 R12
R[13]
27 R13
R[20]
RR[80]
28 R20
R[21]
29 R21
R[22]
30 R22
R[23]
31 R23
RR[81]
R[30]
32 R30
RR[82]
RR[83]
D[2],R[30-33],R[60-63],R[70-73]
RR[70-73],RR[80-83]
INT[1-2],IOR,IOW,R[12-13],R[20-23]
RB[1],RB[11],RB[21],RD[0],R[90-93]
C200
+5V
0.1
+5V
R201
2.2K
R202
2.2K
R203
2.2K
R204
2.2K
R205
2.2K
CN201 CN2
2 2
+5V
+5V(V1)
(V1)
1 1
17 17
6 6
11 11
22 22
RR[70]
28 28
RR[71]
29 29
RR[72]
30 30
RR[73]
31 31
RR[80]
32 32
SHIFT MENU1
SW50 SW51
RR[81]
23 23
MENU2
SW52
RR[82]
24 24
MENU3
SW53
RR[83]
25 25
R[90]
26 26
RD[0]
27 27
D201
3 3
4 4
R[60] R[60]
7 7
R[61] R[61]
8 8
R[62] R[62]
9 9
R[63] R[63]
10 10
R[32]
13 13
R[33]
12 12
R[31] R[31]
16 16
R[70]
18 18
R[71]
19 19
R[72]
20 20
R[73]
21 21
R[30] R[30]
15 15
D[2] D[2]
14 14
33 33
PSUP1178Z
34 34
35 35
36 36
5 5
R92
1M Ω
RD1
64
RD0 63
24
RB21
62
21
RB11
61
RB01 60
VCC
59
SEL 58
4BIT IC6
RA1 57
MICROCOMPUTER
RA0
56
R93 55
21
R92 54
R91
53
R90 52
R83 51
23 22
R82
50
R81 49
+5V(V1)
R104
Q30
4.7K
R101
4.7K
Q27
Q29
Q28
-5V
LCD CONTRAST
CONTROL
D[5],D[9-12],R[1-3]
+5V(V1)
RD[0]
RB[21]
RB[11]
RB[1]
+5V(V1)
+5V(V1)
R[93]
R[92]
R[91]
R[90]
D3
RR[83]
D4
RR[82]
D5
RR[81]